Thanks for the suggestion! We have modified 'configure.ac' (see attached) a
little bit (with reference to gnash-0.8.1/configure.ac) to enable ffmpeg as
media-handler in the configuration. However, we find that you have hard-coded
GST in your source code as the media-handler
(server/parser/video_stream_def.h); so that we have to use
'--enable-media=gst' in order to proceed to build and install.

Therefore, if you would still consider the ffmpeg option, could we help with,
for example, coding the ffmpeg related media-handling components? We are
working for embedded platform, so we would appreciate it if the GStreamer's
7MB size libraries could be removed. Thank you!

Absolutely.
Because we're no longer maintaining the ffmpeg backend we have not
attempted to preserve the abstraction layer we previously had. However,
reintroducing it is fairly straight forward. This would produce the
problem that the ffmpeg video handler will be incompatible with our
abstraction layer, unless you pick it up to bring it up to speed
with the rest of our new code.
Bastiaan